Finding the Fourth Proportional to 83,123.42, 124,684.11 and 56,403.20

Step by Step Solution

1. Step 1: Write the proportion equation
   83,123.42 : 124,684.11 = 56,403.20 : x
2. Step 2: Convert to fraction form
   83,123.42/124,684.11 = 56,403.20/x
3. Step 3: Cross multiply
   83,123.42x = 124,684.11 × 56,403.20
4. Step 4: Simplify right side
   83,123.42x = 7,032,583,104.86
5. Step 5: Solve for x
   x = 7,032,583,104.86/83,123.42
6. Step 6: Final answer
   x = 84,604.12